不同植被类型土壤有机碳变化  

Changes of Soil Organic Carbon Content under Different Vegetation Types

作　　者：张文河[1] 查向浩[1] 易海艳[2] 徐安阳[1] 

机构地区：[1]喀什师范学院化学与环境科学系,新疆喀什844006 [2]喀什师范学院生物与地理科学系,新疆喀什844006

出　　处：《湖北农业科学》2015年第11期2594-2598,共5页Hubei Agricultural Sciences

基　　金：新疆维吾尔自治区高校科研计划青年教师科研资助项目(XJEDU2013S37)

摘　　要：研究以喀什市不同植被类型（乔木、灌木、草丛、裸地）为对象,分析其0~20 cm土壤剖面的土壤有机碳含量和土壤有机碳密度。结果表明,喀什市土壤0~20 cm剖面的平均土壤有机碳含量和平均土壤有机碳密度的大小关系均为草丛（10.130 810 g/kg,3.021 713 kg/m2）〉乔木（8.775 414 g/kg,2.590 197 kg/m2）〉灌木（7.853 428 g/kg,2.383 278 kg/m2）〉裸地（6.364 066 g/kg,1.925 676 kg/m2）。不同植被类型土壤有机碳含量和有机碳密度变化基本一致,但二者变化幅度不同。在城市中建设植被有助于土壤固碳,相比于灌木,草丛和乔木的固碳效果较好。另外,应减少和避免强烈的人为干扰,以防止浅层土壤碳损失,维持喀什市土壤碳库稳定。Taking the Kashgar city different vegetation types （shrub,forest,grass land and bare land） as the research objects, the organic carbon contents and the organic carbon density of the soil in the soil profile at 0-20 cm depth were analyzed. The research results showed that the average organic carbon contents and the average organic carbon density of the soil in the soil profile at 0-20 cm depth were grass land （10.130 810g/kg,3.021 713 kg/m2）〉 shrub（8.775 414g/kg,2.590 197 kg/m2）〉 forest （7.853 428 g/kg,2.383 278 kg/m2）〉bare land （6.364 066 g/kg, 1.925 676 kg/m2）. The distributions in soil profiles of the organic carbon contents and the organic carbon density under each vegetation type were similar but differed in amplitude of variation. Vegetation construction on city would contribute to soil carbon sequestration and the grass land and shrub communi- ties had better effects. Strong human disturbance should be reduced or avoided to prevent the change of carbon in shallow soil layers and to keep the stability of the soil carbon pool.

关 键 词：土壤 有机碳 植被类型 

分 类 号：Q948.113[生物学—植物学]